A textile firm operates a plant in the North (where capital expensive relative to labour)as well as a plant in the South (where labour is expensive relative to capital ). In this diagram above the Southern plant will minimize cost by combining labour and capital in the amounts indicated by
The demand and supply equations for a commodity are given respectively as D = 20 - 1/2P; S = 8 + 1/4P. Recalling that at equilibrium, D = S, the equilibrium (P) and quantity (Q) can be obtained as
